TABLE 3.
Results of VT genotyping
| VT genotype | Total no. | No. and type of isolate in indicated group
|
|||
|---|---|---|---|---|---|
| Serogroup O157
|
Other O serogroups
|
||||
| Human | Animal | Human | Animal | ||
| VT1 | 118 | 0 | 0 | 95 | 23 |
| VT2 | 42 | 16 | 0 | 14 | 12 |
| VT2vh-a | 33 | 27 | 1 | 4 | 1 |
| VT2vh-b | 9 | 0 | 0 | 5 | 4 |
| VT2vh atypicala | 15 | 0 | 0 | 12 | 3 |
| VT2 + VT2vh-a | 32 | 28 | 0 | 3 | 1 |
| VT2 + VT2vh-b | 6 | 0 | 0 | 1 | 5 |
| VT2d-Ount | 23 | 0 | 0 | 15 | 8 |
| VT2d-OX3a | 3 | 0 | 0 | 1 | 2 |
| VT2vh-a + VT2d-Ount | 1 | 0 | 0 | 0 | 1 |
| VT1 + VT2 | 5 | 3 | 0 | 1 | 1 |
| VT1 + VT2vh-a | 21 | 20 | 1 | 0 | 0 |
| VT1 + VT2vh-b | 4 | 0 | 0 | 1 | 3 |
| VT1 + VT2vh-atypicala | 1 | 0 | 0 | 1 | 0 |
| VT1 + VT2d-Ount | 38 | 0 | 0 | 28 | 10 |
| VT1 + VT2 + VT2vh-a | 1 | 1 | 0 | 0 | 0 |
| VT1 + VT2 + VT2vh-b | 1 | 0 | 0 | 1 | 0 |
| VT2e | 6 | 0 | 0 | 4 | 2 |
| Total | 359 | 95 | 2 | 186 | 76 |
a
Positive with VT2v1 and VT2v-2 primers and negative with VT2-cm and VT2-f primers, but restriction of amplicons obtained with VT2-c and VT2-d primers and with VT2-e and VT2-f primers does not fit predicted RFLP patterns.